Blog · Performance & Optimization
Performance & Optimization
Practical guides to speed up your sites and apps and pass Core Web Vitals.
Code Splitting Guide 2026: Faster Loads with Dynamic Imports
How to split your JavaScript so users download only what they need — route-based splitting, dynamic import(), React.lazy, vendor chunks, prefetching and handling stale-deploy chunk errors — each with why and a code example.
Performance & OptimizationHow to Optimize CSS in 2026: 14 Techniques for Fast Styles
Practical CSS performance techniques — remove unused CSS, inline critical styles, GPU-composited animation, content-visibility, containment and font optimization — each with why it matters and a code example.
Performance & OptimizationHow to Optimize React Performance in 2026: 14 Techniques
Practical React performance techniques — the React Compiler, stable keys, list virtualization, useTransition/useDeferredValue, code splitting, Server Components and streaming SSR — each with why it matters and a code example.
Performance & OptimizationHow to Reduce JavaScript Bundle Size in 2026: 14 Ways
Cut your JavaScript bundle — measure with an analyzer, code-split by route, tree-shake, replace heavy dependencies, enable Brotli, set a realistic browserslist and enforce a budget in CI — each with why and a code example.
Performance & OptimizationHow to Speed Up JavaScript in 2026: 16 Performance Techniques
Make JavaScript fast — break up long tasks with scheduler.yield(), offload to Web Workers, avoid layout thrashing, debounce, use passive listeners and the right data structures — each with why it matters and a code example.
Performance & OptimizationImage Optimization Guide 2026: Faster Images, Better LCP
A complete guide to optimizing images — modern formats (AVIF/WebP), responsive srcset, preventing CLS, lazy loading vs the LCP image, compression, CDNs and placeholders — each with why and a code example.
Performance & OptimizationHow to Improve Core Web Vitals in 2026: LCP, INP & CLS
A practical guide to the three Core Web Vitals — what LCP, INP and CLS measure, the exact 2026 thresholds, and how to fix each one — with the reasoning and code for every technique.
Performance & OptimizationLazy Loading Best Practices 2026: Images, Components & Routes
How to lazy-load the right way — native image/iframe lazy loading, never deferring the LCP image, route and component splitting, IntersectionObserver, prefetch-on-intent and handling chunk errors — each with why and a code example.
Performance & OptimizationModern Web Performance Checklist 2026: 37 Wins
A complete, up-to-date web performance checklist for 2026 — measurement, loading and delivery, JavaScript, CSS, images and fonts, Core Web Vitals, caching and monitoring — 37 concrete, verified items grouped so you can work top to bottom.
Performance & OptimizationTree Shaking Guide 2026: Eliminate Dead Code from Bundles
How tree shaking works and how to make it actually work — ES modules, the sideEffects flag (and its CSS gotcha), avoiding barrel files, pure annotations and verifying with an analyzer — each with why and a code example.
Performance is a feature users feel before they can name it — the difference between an app that responds and one that hesitates. This category is about making the web fast in the ways that matter: quicker loads, smoother interaction, and passing Core Web Vitals, the metrics Google uses to measure real-world experience.
The approach is measure-first. Guessing at bottlenecks wastes effort on the wrong thing; the guides here show how to profile, read the numbers, and target the change that moves them. Small techniques can be tried directly in the editor, where the live preview makes a rendering or layout cost visible immediately.
Coverage runs from the fundamentals — LCP, CLS and INP, bundle size, lazy loading and caching — to framework-specific wins in React and modern build tools. The goal is durable speed: habits that keep a site fast as it grows, not a one-off tune-up that regresses next sprint.